Eternal Soul

Adamant - When Eternal Soul enters the
battlefield, if at least three black mana were
spent to cast this spell, create X 1/1 black
Skeleton creature tokens and if at least three
white mana were spent to cast this spell, gain X
life.
{2}{w}{b}: Return Eternal Soul from your
graveyard to your hand.
Empires rise and fall. He is forever.